公开(公告)号：US20210036374A1

公开(公告)日：2021-02-04

申请号：US16641052

申请日：2018-09-14

Applicant: NEC Corporation

Inventor： Kazuhiko INOUE

IPC: H01M10/0585 ,  H01M4/74

Abstract: The purpose of the present invention is to provide a current collector that has high strength and is easily impregnated with an electrolyte. This current collector is provided with an opening formation portion provided with a plurality of openings, the current collector being characterized in that a protruding portion is formed at the tip of each opening, and only partial locations of the opening formation portion reach an end surface of the current collector and the other locations thereof do not reach the end surface.

公开(公告)号：US20190123319A1

公开(公告)日：2019-04-25

申请号：US16094353

申请日：2017-04-18

Applicant: NEC Corporation

Inventor： Kenichi SHIMURA ,  Kazuhiko INOUE

IPC: H01M2/16 ,  H01M10/04

Abstract: Provided is a battery comprising a separator comprising inorganic particles for preventing a short-circuit, wherein the inorganic particles are not removed readily from the separator. This battery is characterized by comprising a separator comprising a base material resin having voids and an inorganic particle having a surface (A) facing the void and a surface (B) in contact with the resin, wherein the length of the surface (A) is 50% or more of the length of the outer periphery of the particle in a cross-sectional SEM photograph of the separator.

公开(公告)号：US20180358649A1

公开(公告)日：2018-12-13

申请号：US15743903

申请日：2016-07-27

Applicant: NEC CORPORATION

Inventor： Kazuhiko INOUE ,  Noboru YOSHIDA ,  Kenichi SHIMURA

IPC: H01M10/0525 ,  H01M10/0585 ,  H01M4/62 ,  H01M2/16

CPC classification number: H01M10/0525 ,  H01M2/16 ,  H01M2/1626 ,  H01M4/13 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/623 ,  H01M10/052 ,  H01M10/0585 ,  H01M2004/027 ,  H01M2004/028

Abstract: The lithium ion secondary battery is a secondary battery in which a positive electrode 30 and a negative electrode 40 are stacked alternatively via a separator 25, wherein the separator 25 is a single layer and is not melted or softened at least 200° C., a thermal shrinkage ratio of the separator being 3% or below, wherein an insulating layer 70 is formed on a surface of the positive electrode 30, the surface facing to the separator 25.

公开(公告)号：US20180175451A1

公开(公告)日：2018-06-21

申请号：US15576073

申请日：2016-06-03

Applicant: NEC Corporation

Inventor： Kazuhiko INOUE ,  Makihiro OTOHATA ,  Shinya SUDO

IPC: H01M10/0585 ,  H01M2/16 ,  H01M2/02 ,  H01M10/0587

CPC classification number: H01M10/0585 ,  H01M2/0267 ,  H01M2/0287 ,  H01M2/1653 ,  H01M10/0587

Abstract: A film package battery 1 has a battery element (20) having a positive electrode, a negative electrode and a separator that are stacked or wound, wherein, at least at 200° C., the separator does not melt or soften and has a heat shrinkage ratio of 3% or less; a film package (10) enclosing the battery element; and a fixing tape (70) fixed to a part of the battery element and fixed to an inner surface of the film package.

公开(公告)号：US20180040867A1

公开(公告)日：2018-02-08

申请号：US15555454

申请日：2016-03-04

Applicant: NEC CORPORATION

Inventor： Kenichi SHIMURA ,  Noboru YOSHIDA ,  Kazuhiko INOUE

IPC: H01M2/16 ,  H01M10/052 ,  H01M4/04 ,  H01M10/04 ,  H01M4/62

Abstract: The separator for secondary battery, comprising: a porous substrate having a melting temperature or a decomposition temperature of 200° C. or more; and a resin member formed at least inside of the substrate in a plane section that occupies at least a part of a plane along with a thickness direction of the substrate; wherein said resin member is coated on inner surfaces of pores without completely blocking connecting paths that connects pores of the porous member, and wherein a distribution density of the resin member becomes lower toward inside of the substrate.

公开(公告)号：US20170237060A1

公开(公告)日：2017-08-17

申请号：US15502676

申请日：2015-08-05

Applicant: NEC CORPORATION

Inventor： Kazuhiko INOUE ,  Kenichi SHIMURA

IPC: H01M2/34 ,  H01M2/08 ,  H01M10/42 ,  H01M2/30 ,  H01M2/06

Abstract: With a battery using a flexible outer package, electric current is reliably interrupted when the temperature is increased due to the occurrence of abnormality, thereby preventing excessive heat generation. A battery 1 includes a battery element 10, a pair of first terminals 11 that are electrically connected to the battery element 10, a flexible outer package 13, and a second terminal 12. The outer package 13 is partitioned into a first chamber 13a in which the battery element 10 is sealed and a second chamber 13b which is adjacent to the first chamber 13a. The second terminal 12 is led out from the second chamber 13b to the outside of the outer package 13 so that one first terminal 11 is made electrically connectable to an external wiring through the second chamber 13b. A gas generation material 14 which generates a gas at a predetermined temperature or higher is sealed in the second chamber 13b.